Official OPPO BDP-103 Owner's Thread - Page 592 - AVS Forum
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post #17731 of 17740 Old Yesterday, 01:59 PM
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Originally Posted by Daffietje View Post
Is it known that the Oppo is clipping the image above 90IRE when the contrast setting is set at its default value of 0 ?
The person who did my ISF calibration on my Panasonic P50GT60 Plasma is saying this.
To not have it clip the image the contrast setting on the Oppo should be set @ -2, according to him.

Any truth to that ?
Extremely unlikely. A large number of 103 owners have OCD for things like that including me. NO ONE in the history of this thread has reported anything like that. Standard practice for calibration is to adjust the contrast on the display using something like the clipping pattern on the Spears & Munsil test disc's as well as setting black level (brightness) on the display before starting the calibration. If using the Oppo to play back test patterns you would never make the adjustment in the Oppo. If you did the calibration results would be wrong for other sources i.e. STB. Has the calibrator ever done a calibration before? Is he from Best Buy?
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post #17732 of 17740 Old Yesterday, 02:14 PM
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Yeah he has done it for years, not from Best Buy. He is from The Netherlands.

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post #17733 of 17740 Old Yesterday, 02:30 PM
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Quote:
Originally Posted by Daffietje View Post
Is it known that the Oppo is clipping the image above 90IRE when the contrast setting is set at its default value of 0 ?
The person who did my ISF calibration on my Panasonic P50GT60 Plasma is saying this.
To not have it clip the image the contrast setting on the Oppo should be set @ -2, according to him.

Any truth to that ?
In the US, the standard method used by professional calibrators is to leave OPPO players in a default state and calibrate the display. If your calibrator has already done the work and you're happy with it, I would say leave it alone.
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post #17734 of 17740 Old Yesterday, 03:38 PM
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Originally Posted by Daffietje View Post
Yeah he has done it for years, not from Best Buy. He is from The Netherlands.
Its possible you misunderstood, and what was really happening was that your display was clipping if the player was set to "0". Not knowing the specifics of the display or how it was set up makes it impossible to say. In any case, no the player does not clip whites. In fact it outputs WTW if its present in the content.
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post #17735 of 17740 Old Yesterday, 03:44 PM
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Quote:
Originally Posted by Daffietje View Post
Is it known that the Oppo is clipping the image above 90IRE when the contrast setting is set at its default value of 0 ?
The person who did my ISF calibration on my Panasonic P50GT60 Plasma is saying this.
To not have it clip the image the contrast setting on the Oppo should be set @ -2, according to him.

Any truth to that ?
The OPPO 103 does not clip Peak Whites -- unless of course you are using RGB PC Level as your output format, which does clip those by definition.

Either your calibrator got confused or there is a problem in your Display.
--Bob

Last edited by Bob Pariseau; Yesterday at 03:45 PM.
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post #17736 of 17740 Old Today, 04:46 AM
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Originally Posted by Bob Pariseau View Post
The OPPO 103 does not clip Peak Whites -- unless of course you are using RGB PC Level as your output format, which does clip those by definition.

Either your calibrator got confused or there is a problem in your Display.
--Bob
I told him your reaction. His reaction is :

"Afaik (measured on different Panasonic TV's in the 50/60 series) the Oppo is clipping the CMS if contrast is set to 0. If set to -1 or -2 it is not clipping anymore.
The differences are minimal though."

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post #17737 of 17740 Old Today, 05:30 AM
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Quote:
Originally Posted by Daffietje View Post
I told him your reaction. His reaction is :

"Afaik (measured on different Panasonic TV's in the 50/60 series) the Oppo is clipping the CMS if contrast is set to 0. If set to -1 or -2 it is not clipping anymore.
The differences are minimal though."
Hmmm....

I'd be interested to know what this guy has to report about other makes/models of Blu-ray player connected to a Panasonic P50GT60?

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post #17738 of 17740 Old Today, 07:09 AM
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Quote:
Originally Posted by Daffietje View Post
I told him your reaction. His reaction is :

"Afaik (measured on different Panasonic TV's in the 50/60 series) the Oppo is clipping the CMS if contrast is set to 0. If set to -1 or -2 it is not clipping anymore.
The differences are minimal though."
I guarantee you it is not clipping when the OPPO Picture Adjustment settings are all set at their factory default (0) values.

The Dynamic Range High chart on Spears & Munsil shows separate, blinking bars for each individual Luma value from just below Reference White, through Reference White, and through the entire range of Peak Whites if the Display is able to reproduce those. On the 103, they are *ALL* distinguishable from the maximum Luma value (the bright white background of the chart) on a Display that can reproduce those, regardless of whether you are using YCbCr 4:4:4, YCbCr 4:2:2, or RGB Video Level output format.

The output is identical to that of other players known to properly pass Peak Whites -- e.g., the PS3 when set to YCbCr 4:4:4 with SuperWhite enabled.

In addition, OPPO has digital HDMI data captures of the output stream (part of their engineering bench testing) which show the high Luma values all being passed correctly -- a test which is, of course, independent of what any given AVR or Display might do with that output.
--Bob

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post #17739 of 17740 Old Today, 07:16 AM
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Originally Posted by Bob Pariseau View Post
I guarantee you it is not clipping when the OPPO Picture Adjustment settings are all set at their factory default (0) values.

The Dynamic Range High chart on Spears & Munsil shows separate, blinking bars for each individual Luma value from just below Reference White, through Reference White, and through the entire range of Peak Whites if the Display is able to reproduce those. On the 103, they are *ALL* distinguishable from the maximum Luma value (the bright white background of the chart) on a Display that can reproduce those, regardless of whether you are using YCbCr 4:4:4, YCbCr 4:2:2, or RGB Video Level output format.

The output is identical to that of other players known to properly pass Peak Whites -- e.g., the PS3 when set to YCbCr 4:4:4 with SuperWhite enabled.

In addition, OPPO has digital HDMI data captures of the output stream (part of their engineering bench testing) which show the high Luma values all being passed correctly -- a test which is, thus, independent of what any AVR or Display might do with that output.
--Bob
He also mentioned the White was not clipping but the CMS was/is above IRE90.
So lowering the contrast value on the Oppo was not to prevent the Oppo from clipping the White (because the Oppo is not doing that) but to prevent the Oppo from clipping the CMS above the IRE90 range.

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post #17740 of 17740 Old Today, 07:26 AM
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^ Again, the HDMI digital data captures OPPO has done show this not to be the case. They run files with specific pixel values (Luma and the 2 Color Differences) through the player and capture the digital output stream (no AVR or Display involved) to make sure those values are not being altered (clipped). This is part of the Q/A of Dithering, for example, which imposes small, random differences by design, so you need to check that the differences are of the intended size and only occurring when they are supposed to be occurring.

It's always possible that a bug has crept in of course since the last time they checked that, but rendering bugs are usually not that subtle.
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